blob: 943c8712bd971c6372d0326c3e428630c0981aa4 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* xfrm_user.c: User interface to configure xfrm engine.
2 *
3 * Copyright (C) 2002 David S. Miller (davem@redhat.com)
4 *
5 * Changes:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
Trent Jaegerdf718372005-12-13 23:12:27 -080010 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 */
12
Herbert Xu9409f382006-08-06 19:49:12 +100013#include <linux/crypto.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
15#include <linux/kernel.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/socket.h>
19#include <linux/string.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/pfkeyv2.h>
23#include <linux/ipsec.h>
24#include <linux/init.h>
25#include <linux/security.h>
26#include <net/sock.h>
27#include <net/xfrm.h>
Thomas Graf88fc2c82005-11-10 02:25:54 +010028#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <asm/uaccess.h>
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -070030#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
31#include <linux/in6.h>
32#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Herbert Xu1a6509d2008-01-28 19:37:29 -080034static inline int aead_len(struct xfrm_algo_aead *alg)
35{
36 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
37}
38
Thomas Graf5424f322007-08-22 14:01:33 -070039static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{
Thomas Graf5424f322007-08-22 14:01:33 -070041 struct nlattr *rt = attrs[type];
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 struct xfrm_algo *algp;
43
44 if (!rt)
45 return 0;
46
Thomas Graf5424f322007-08-22 14:01:33 -070047 algp = nla_data(rt);
Eric Dumazet0f99be02008-01-08 23:39:06 -080048 if (nla_len(rt) < xfrm_alg_len(algp))
Herbert Xu31c26852005-05-19 12:39:49 -070049 return -EINVAL;
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 switch (type) {
52 case XFRMA_ALG_AUTH:
Linus Torvalds1da177e2005-04-16 15:20:36 -070053 case XFRMA_ALG_CRYPT:
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 case XFRMA_ALG_COMP:
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 break;
56
57 default:
58 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -070059 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
62 return 0;
63}
64
Martin Willi4447bb32009-11-25 00:29:52 +000065static int verify_auth_trunc(struct nlattr **attrs)
66{
67 struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
68 struct xfrm_algo_auth *algp;
69
70 if (!rt)
71 return 0;
72
73 algp = nla_data(rt);
74 if (nla_len(rt) < xfrm_alg_auth_len(algp))
75 return -EINVAL;
76
77 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
78 return 0;
79}
80
Herbert Xu1a6509d2008-01-28 19:37:29 -080081static int verify_aead(struct nlattr **attrs)
82{
83 struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
84 struct xfrm_algo_aead *algp;
85
86 if (!rt)
87 return 0;
88
89 algp = nla_data(rt);
90 if (nla_len(rt) < aead_len(algp))
91 return -EINVAL;
92
93 algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0';
94 return 0;
95}
96
Thomas Graf5424f322007-08-22 14:01:33 -070097static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -070098 xfrm_address_t **addrp)
99{
Thomas Graf5424f322007-08-22 14:01:33 -0700100 struct nlattr *rt = attrs[type];
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700101
Thomas Grafcf5cb792007-08-22 13:59:04 -0700102 if (rt && addrp)
Thomas Graf5424f322007-08-22 14:01:33 -0700103 *addrp = nla_data(rt);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700104}
Trent Jaegerdf718372005-12-13 23:12:27 -0800105
Thomas Graf5424f322007-08-22 14:01:33 -0700106static inline int verify_sec_ctx_len(struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -0800107{
Thomas Graf5424f322007-08-22 14:01:33 -0700108 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -0800109 struct xfrm_user_sec_ctx *uctx;
Trent Jaegerdf718372005-12-13 23:12:27 -0800110
111 if (!rt)
112 return 0;
113
Thomas Graf5424f322007-08-22 14:01:33 -0700114 uctx = nla_data(rt);
Thomas Grafcf5cb792007-08-22 13:59:04 -0700115 if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
Trent Jaegerdf718372005-12-13 23:12:27 -0800116 return -EINVAL;
117
118 return 0;
119}
120
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static int verify_newsa_info(struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700123 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124{
125 int err;
126
127 err = -EINVAL;
128 switch (p->family) {
129 case AF_INET:
130 break;
131
132 case AF_INET6:
133#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
134 break;
135#else
136 err = -EAFNOSUPPORT;
137 goto out;
138#endif
139
140 default:
141 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700142 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144 err = -EINVAL;
145 switch (p->id.proto) {
146 case IPPROTO_AH:
Martin Willi4447bb32009-11-25 00:29:52 +0000147 if ((!attrs[XFRMA_ALG_AUTH] &&
148 !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800149 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700150 attrs[XFRMA_ALG_CRYPT] ||
151 attrs[XFRMA_ALG_COMP])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 goto out;
153 break;
154
155 case IPPROTO_ESP:
Herbert Xu1a6509d2008-01-28 19:37:29 -0800156 if (attrs[XFRMA_ALG_COMP])
157 goto out;
158 if (!attrs[XFRMA_ALG_AUTH] &&
Martin Willi4447bb32009-11-25 00:29:52 +0000159 !attrs[XFRMA_ALG_AUTH_TRUNC] &&
Herbert Xu1a6509d2008-01-28 19:37:29 -0800160 !attrs[XFRMA_ALG_CRYPT] &&
161 !attrs[XFRMA_ALG_AEAD])
162 goto out;
163 if ((attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000164 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800165 attrs[XFRMA_ALG_CRYPT]) &&
166 attrs[XFRMA_ALG_AEAD])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 goto out;
168 break;
169
170 case IPPROTO_COMP:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700171 if (!attrs[XFRMA_ALG_COMP] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800172 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700173 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000174 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700175 attrs[XFRMA_ALG_CRYPT])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 goto out;
177 break;
178
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700179#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
180 case IPPROTO_DSTOPTS:
181 case IPPROTO_ROUTING:
Thomas Graf35a7aa02007-08-22 14:00:40 -0700182 if (attrs[XFRMA_ALG_COMP] ||
183 attrs[XFRMA_ALG_AUTH] ||
Martin Willi4447bb32009-11-25 00:29:52 +0000184 attrs[XFRMA_ALG_AUTH_TRUNC] ||
Herbert Xu1a6509d2008-01-28 19:37:29 -0800185 attrs[XFRMA_ALG_AEAD] ||
Thomas Graf35a7aa02007-08-22 14:00:40 -0700186 attrs[XFRMA_ALG_CRYPT] ||
187 attrs[XFRMA_ENCAP] ||
188 attrs[XFRMA_SEC_CTX] ||
189 !attrs[XFRMA_COADDR])
Masahide NAKAMURAe23c7192006-08-23 20:33:28 -0700190 goto out;
191 break;
192#endif
193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 default:
195 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700196 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Herbert Xu1a6509d2008-01-28 19:37:29 -0800198 if ((err = verify_aead(attrs)))
199 goto out;
Martin Willi4447bb32009-11-25 00:29:52 +0000200 if ((err = verify_auth_trunc(attrs)))
201 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700202 if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700204 if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700206 if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 goto out;
Thomas Graf35a7aa02007-08-22 14:00:40 -0700208 if ((err = verify_sec_ctx_len(attrs)))
Trent Jaegerdf718372005-12-13 23:12:27 -0800209 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 err = -EINVAL;
212 switch (p->mode) {
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700213 case XFRM_MODE_TRANSPORT:
214 case XFRM_MODE_TUNNEL:
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700215 case XFRM_MODE_ROUTEOPTIMIZATION:
Diego Beltrami0a694522006-10-03 23:47:05 -0700216 case XFRM_MODE_BEET:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 break;
218
219 default:
220 goto out;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700221 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
223 err = 0;
224
225out:
226 return err;
227}
228
229static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
230 struct xfrm_algo_desc *(*get_byname)(char *, int),
Thomas Graf5424f322007-08-22 14:01:33 -0700231 struct nlattr *rta)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 struct xfrm_algo *p, *ualg;
234 struct xfrm_algo_desc *algo;
235
236 if (!rta)
237 return 0;
238
Thomas Graf5424f322007-08-22 14:01:33 -0700239 ualg = nla_data(rta);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 algo = get_byname(ualg->alg_name, 1);
242 if (!algo)
243 return -ENOSYS;
244 *props = algo->desc.sadb_alg_id;
245
Eric Dumazet0f99be02008-01-08 23:39:06 -0800246 p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 if (!p)
248 return -ENOMEM;
249
Herbert Xu04ff1262006-08-13 08:50:00 +1000250 strcpy(p->alg_name, algo->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 *algpp = p;
252 return 0;
253}
254
Martin Willi4447bb32009-11-25 00:29:52 +0000255static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
256 struct nlattr *rta)
257{
258 struct xfrm_algo *ualg;
259 struct xfrm_algo_auth *p;
260 struct xfrm_algo_desc *algo;
261
262 if (!rta)
263 return 0;
264
265 ualg = nla_data(rta);
266
267 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
268 if (!algo)
269 return -ENOSYS;
270 *props = algo->desc.sadb_alg_id;
271
272 p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
273 if (!p)
274 return -ENOMEM;
275
276 strcpy(p->alg_name, algo->name);
277 p->alg_key_len = ualg->alg_key_len;
278 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
279 memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8);
280
281 *algpp = p;
282 return 0;
283}
284
285static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
286 struct nlattr *rta)
287{
288 struct xfrm_algo_auth *p, *ualg;
289 struct xfrm_algo_desc *algo;
290
291 if (!rta)
292 return 0;
293
294 ualg = nla_data(rta);
295
296 algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
297 if (!algo)
298 return -ENOSYS;
299 if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
300 return -EINVAL;
301 *props = algo->desc.sadb_alg_id;
302
303 p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
304 if (!p)
305 return -ENOMEM;
306
307 strcpy(p->alg_name, algo->name);
308 if (!p->alg_trunc_len)
309 p->alg_trunc_len = algo->uinfo.auth.icv_truncbits;
310
311 *algpp = p;
312 return 0;
313}
314
Herbert Xu1a6509d2008-01-28 19:37:29 -0800315static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props,
316 struct nlattr *rta)
317{
318 struct xfrm_algo_aead *p, *ualg;
319 struct xfrm_algo_desc *algo;
320
321 if (!rta)
322 return 0;
323
324 ualg = nla_data(rta);
325
326 algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
327 if (!algo)
328 return -ENOSYS;
329 *props = algo->desc.sadb_alg_id;
330
331 p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
332 if (!p)
333 return -ENOMEM;
334
335 strcpy(p->alg_name, algo->name);
336 *algpp = p;
337 return 0;
338}
339
Joy Latten661697f2007-04-13 16:14:35 -0700340static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx)
Trent Jaegerdf718372005-12-13 23:12:27 -0800341{
Trent Jaegerdf718372005-12-13 23:12:27 -0800342 int len = 0;
343
344 if (xfrm_ctx) {
345 len += sizeof(struct xfrm_user_sec_ctx);
346 len += xfrm_ctx->ctx_len;
347 }
348 return len;
349}
350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
352{
353 memcpy(&x->id, &p->id, sizeof(x->id));
354 memcpy(&x->sel, &p->sel, sizeof(x->sel));
355 memcpy(&x->lft, &p->lft, sizeof(x->lft));
356 x->props.mode = p->mode;
357 x->props.replay_window = p->replay_window;
358 x->props.reqid = p->reqid;
359 x->props.family = p->family;
David S. Miller54489c142006-10-27 15:29:47 -0700360 memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 x->props.flags = p->flags;
Herbert Xu196b0032007-07-31 02:04:32 -0700362
Steffen Klassertccf9b3b2008-07-10 16:55:37 -0700363 if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC))
Herbert Xu196b0032007-07-31 02:04:32 -0700364 x->sel.family = p->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365}
366
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800367/*
368 * someday when pfkey also has support, we could have the code
369 * somehow made shareable and move it to xfrm_state.c - JHS
370 *
371*/
Thomas Graf5424f322007-08-22 14:01:33 -0700372static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800373{
Thomas Graf5424f322007-08-22 14:01:33 -0700374 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
375 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
376 struct nlattr *et = attrs[XFRMA_ETIMER_THRESH];
377 struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800378
379 if (rp) {
380 struct xfrm_replay_state *replay;
Thomas Graf5424f322007-08-22 14:01:33 -0700381 replay = nla_data(rp);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800382 memcpy(&x->replay, replay, sizeof(*replay));
383 memcpy(&x->preplay, replay, sizeof(*replay));
384 }
385
386 if (lt) {
387 struct xfrm_lifetime_cur *ltime;
Thomas Graf5424f322007-08-22 14:01:33 -0700388 ltime = nla_data(lt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800389 x->curlft.bytes = ltime->bytes;
390 x->curlft.packets = ltime->packets;
391 x->curlft.add_time = ltime->add_time;
392 x->curlft.use_time = ltime->use_time;
393 }
394
Thomas Grafcf5cb792007-08-22 13:59:04 -0700395 if (et)
Thomas Graf5424f322007-08-22 14:01:33 -0700396 x->replay_maxage = nla_get_u32(et);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800397
Thomas Grafcf5cb792007-08-22 13:59:04 -0700398 if (rt)
Thomas Graf5424f322007-08-22 14:01:33 -0700399 x->replay_maxdiff = nla_get_u32(rt);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800400}
401
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800402static struct xfrm_state *xfrm_state_construct(struct net *net,
403 struct xfrm_usersa_info *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700404 struct nlattr **attrs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 int *errp)
406{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800407 struct xfrm_state *x = xfrm_state_alloc(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 int err = -ENOMEM;
409
410 if (!x)
411 goto error_no_put;
412
413 copy_from_user_state(x, p);
414
Herbert Xu1a6509d2008-01-28 19:37:29 -0800415 if ((err = attach_aead(&x->aead, &x->props.ealgo,
416 attrs[XFRMA_ALG_AEAD])))
417 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000418 if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
419 attrs[XFRMA_ALG_AUTH_TRUNC])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 goto error;
Martin Willi4447bb32009-11-25 00:29:52 +0000421 if (!x->props.aalgo) {
422 if ((err = attach_auth(&x->aalg, &x->props.aalgo,
423 attrs[XFRMA_ALG_AUTH])))
424 goto error;
425 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 if ((err = attach_one_algo(&x->ealg, &x->props.ealgo,
427 xfrm_ealg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700428 attrs[XFRMA_ALG_CRYPT])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 goto error;
430 if ((err = attach_one_algo(&x->calg, &x->props.calgo,
431 xfrm_calg_get_byname,
Thomas Graf35a7aa02007-08-22 14:00:40 -0700432 attrs[XFRMA_ALG_COMP])))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 goto error;
Thomas Graffd211502007-09-06 03:28:08 -0700434
435 if (attrs[XFRMA_ENCAP]) {
436 x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]),
437 sizeof(*x->encap), GFP_KERNEL);
438 if (x->encap == NULL)
439 goto error;
440 }
441
442 if (attrs[XFRMA_COADDR]) {
443 x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]),
444 sizeof(*x->coaddr), GFP_KERNEL);
445 if (x->coaddr == NULL)
446 goto error;
447 }
448
Herbert Xu72cb6962005-06-20 13:18:08 -0700449 err = xfrm_init_state(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 if (err)
451 goto error;
452
Thomas Graffd211502007-09-06 03:28:08 -0700453 if (attrs[XFRMA_SEC_CTX] &&
454 security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX])))
Trent Jaegerdf718372005-12-13 23:12:27 -0800455 goto error;
456
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 x->km.seq = p->seq;
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800458 x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800459 /* sysctl_xfrm_aevent_etime is in 100ms units */
Alexey Dobriyanb27aead2008-11-25 18:00:48 -0800460 x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -0800461 x->preplay.bitmap = 0;
462 x->preplay.seq = x->replay.seq+x->replay_maxdiff;
463 x->preplay.oseq = x->replay.oseq +x->replay_maxdiff;
464
465 /* override default values from above */
466
Thomas Graf5424f322007-08-22 14:01:33 -0700467 xfrm_update_ae_params(x, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
469 return x;
470
471error:
472 x->km.state = XFRM_STATE_DEAD;
473 xfrm_state_put(x);
474error_no_put:
475 *errp = err;
476 return NULL;
477}
478
Christoph Hellwig22e70052007-01-02 15:22:30 -0800479static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700480 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800482 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -0700483 struct xfrm_usersa_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 struct xfrm_state *x;
485 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700486 struct km_event c;
Eric Paris25323862008-04-18 10:09:25 -0400487 uid_t loginuid = NETLINK_CB(skb).loginuid;
488 u32 sessionid = NETLINK_CB(skb).sessionid;
489 u32 sid = NETLINK_CB(skb).sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Thomas Graf35a7aa02007-08-22 14:00:40 -0700491 err = verify_newsa_info(p, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (err)
493 return err;
494
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800495 x = xfrm_state_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 if (!x)
497 return err;
498
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700499 xfrm_state_hold(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 if (nlh->nlmsg_type == XFRM_MSG_NEWSA)
501 err = xfrm_state_add(x);
502 else
503 err = xfrm_state_update(x);
504
Eric Paris25323862008-04-18 10:09:25 -0400505 xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -0600506
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 if (err < 0) {
508 x->km.state = XFRM_STATE_DEAD;
Herbert Xu21380b82006-02-22 14:47:13 -0800509 __xfrm_state_put(x);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700510 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 }
512
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700513 c.seq = nlh->nlmsg_seq;
514 c.pid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700515 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700516
517 km_state_notify(x, &c);
Patrick McHardy7d6dfe12005-06-18 22:45:31 -0700518out:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700519 xfrm_state_put(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 return err;
521}
522
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800523static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
524 struct xfrm_usersa_id *p,
Thomas Graf5424f322007-08-22 14:01:33 -0700525 struct nlattr **attrs,
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700526 int *errp)
527{
528 struct xfrm_state *x = NULL;
529 int err;
530
531 if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) {
532 err = -ESRCH;
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800533 x = xfrm_state_lookup(net, &p->daddr, p->spi, p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700534 } else {
535 xfrm_address_t *saddr = NULL;
536
Thomas Graf35a7aa02007-08-22 14:00:40 -0700537 verify_one_addr(attrs, XFRMA_SRCADDR, &saddr);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700538 if (!saddr) {
539 err = -EINVAL;
540 goto out;
541 }
542
Masahide NAKAMURA9abbffe2006-11-24 20:34:51 -0800543 err = -ESRCH;
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800544 x = xfrm_state_lookup_byaddr(net, &p->daddr, saddr,
Alexey Dobriyan221df1e2008-11-25 17:30:50 -0800545 p->proto, p->family);
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700546 }
547
548 out:
549 if (!x && errp)
550 *errp = err;
551 return x;
552}
553
Christoph Hellwig22e70052007-01-02 15:22:30 -0800554static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700555 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800557 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 struct xfrm_state *x;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700559 int err = -ESRCH;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700560 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -0700561 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Eric Paris25323862008-04-18 10:09:25 -0400562 uid_t loginuid = NETLINK_CB(skb).loginuid;
563 u32 sessionid = NETLINK_CB(skb).sessionid;
564 u32 sid = NETLINK_CB(skb).sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800566 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 if (x == NULL)
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700568 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
David S. Miller6f68dc32006-06-08 23:58:52 -0700570 if ((err = security_xfrm_state_delete(x)) != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700571 goto out;
572
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 if (xfrm_state_kern(x)) {
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700574 err = -EPERM;
575 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 }
577
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700578 err = xfrm_state_delete(x);
Joy Latten161a09e2006-11-27 13:11:54 -0600579
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700580 if (err < 0)
581 goto out;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700582
583 c.seq = nlh->nlmsg_seq;
584 c.pid = nlh->nlmsg_pid;
Herbert Xuf60f6b82005-06-18 22:44:37 -0700585 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700586 km_state_notify(x, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700588out:
Eric Paris25323862008-04-18 10:09:25 -0400589 xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid);
Catherine Zhangc8c05a82006-06-08 23:39:49 -0700590 xfrm_state_put(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -0700591 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592}
593
594static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p)
595{
596 memcpy(&p->id, &x->id, sizeof(p->id));
597 memcpy(&p->sel, &x->sel, sizeof(p->sel));
598 memcpy(&p->lft, &x->lft, sizeof(p->lft));
599 memcpy(&p->curlft, &x->curlft, sizeof(p->curlft));
600 memcpy(&p->stats, &x->stats, sizeof(p->stats));
David S. Miller54489c142006-10-27 15:29:47 -0700601 memcpy(&p->saddr, &x->props.saddr, sizeof(p->saddr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 p->mode = x->props.mode;
603 p->replay_window = x->props.replay_window;
604 p->reqid = x->props.reqid;
605 p->family = x->props.family;
606 p->flags = x->props.flags;
607 p->seq = x->km.seq;
608}
609
610struct xfrm_dump_info {
611 struct sk_buff *in_skb;
612 struct sk_buff *out_skb;
613 u32 nlmsg_seq;
614 u16 nlmsg_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615};
616
Thomas Grafc0144be2007-08-22 13:55:43 -0700617static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb)
618{
Thomas Grafc0144be2007-08-22 13:55:43 -0700619 struct xfrm_user_sec_ctx *uctx;
620 struct nlattr *attr;
Herbert Xu68325d32007-10-09 13:30:57 -0700621 int ctx_size = sizeof(*uctx) + s->ctx_len;
Thomas Grafc0144be2007-08-22 13:55:43 -0700622
623 attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size);
624 if (attr == NULL)
625 return -EMSGSIZE;
626
627 uctx = nla_data(attr);
628 uctx->exttype = XFRMA_SEC_CTX;
629 uctx->len = ctx_size;
630 uctx->ctx_doi = s->ctx_doi;
631 uctx->ctx_alg = s->ctx_alg;
632 uctx->ctx_len = s->ctx_len;
633 memcpy(uctx + 1, s->ctx_str, s->ctx_len);
634
635 return 0;
636}
637
Martin Willi4447bb32009-11-25 00:29:52 +0000638static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb)
639{
640 struct xfrm_algo *algo;
641 struct nlattr *nla;
642
643 nla = nla_reserve(skb, XFRMA_ALG_AUTH,
644 sizeof(*algo) + (auth->alg_key_len + 7) / 8);
645 if (!nla)
646 return -EMSGSIZE;
647
648 algo = nla_data(nla);
649 strcpy(algo->alg_name, auth->alg_name);
650 memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8);
651 algo->alg_key_len = auth->alg_key_len;
652
653 return 0;
654}
655
Herbert Xu68325d32007-10-09 13:30:57 -0700656/* Don't change this without updating xfrm_sa_len! */
657static int copy_to_user_state_extra(struct xfrm_state *x,
658 struct xfrm_usersa_info *p,
659 struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 copy_to_user_state(x, p);
662
Herbert Xu050f0092007-10-09 13:31:47 -0700663 if (x->coaddr)
664 NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
665
666 if (x->lastused)
667 NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused);
Herbert Xu050f0092007-10-09 13:31:47 -0700668
Herbert Xu1a6509d2008-01-28 19:37:29 -0800669 if (x->aead)
670 NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead);
Martin Willi4447bb32009-11-25 00:29:52 +0000671 if (x->aalg) {
672 if (copy_to_user_auth(x->aalg, skb))
673 goto nla_put_failure;
674
675 NLA_PUT(skb, XFRMA_ALG_AUTH_TRUNC,
676 xfrm_alg_auth_len(x->aalg), x->aalg);
677 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 if (x->ealg)
Eric Dumazet0f99be02008-01-08 23:39:06 -0800679 NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 if (x->calg)
Thomas Grafc0144be2007-08-22 13:55:43 -0700681 NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683 if (x->encap)
Thomas Grafc0144be2007-08-22 13:55:43 -0700684 NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Thomas Grafc0144be2007-08-22 13:55:43 -0700686 if (x->security && copy_sec_ctx(x->security, skb) < 0)
687 goto nla_put_failure;
Noriaki TAKAMIYA060f02a2006-08-23 18:18:55 -0700688
Herbert Xu68325d32007-10-09 13:30:57 -0700689 return 0;
690
691nla_put_failure:
692 return -EMSGSIZE;
693}
694
695static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
696{
697 struct xfrm_dump_info *sp = ptr;
698 struct sk_buff *in_skb = sp->in_skb;
699 struct sk_buff *skb = sp->out_skb;
700 struct xfrm_usersa_info *p;
701 struct nlmsghdr *nlh;
702 int err;
703
Herbert Xu68325d32007-10-09 13:30:57 -0700704 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
705 XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags);
706 if (nlh == NULL)
707 return -EMSGSIZE;
708
709 p = nlmsg_data(nlh);
710
711 err = copy_to_user_state_extra(x, p, skb);
712 if (err)
713 goto nla_put_failure;
714
Thomas Graf98250692007-08-22 12:47:26 -0700715 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 return 0;
717
Thomas Grafc0144be2007-08-22 13:55:43 -0700718nla_put_failure:
Thomas Graf98250692007-08-22 12:47:26 -0700719 nlmsg_cancel(skb, nlh);
Herbert Xu68325d32007-10-09 13:30:57 -0700720 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721}
722
Timo Teras4c563f72008-02-28 21:31:08 -0800723static int xfrm_dump_sa_done(struct netlink_callback *cb)
724{
725 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
726 xfrm_state_walk_done(walk);
727 return 0;
728}
729
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
731{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800732 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -0800733 struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 struct xfrm_dump_info info;
735
Timo Teras4c563f72008-02-28 21:31:08 -0800736 BUILD_BUG_ON(sizeof(struct xfrm_state_walk) >
737 sizeof(cb->args) - sizeof(cb->args[0]));
738
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 info.in_skb = cb->skb;
740 info.out_skb = skb;
741 info.nlmsg_seq = cb->nlh->nlmsg_seq;
742 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -0800743
744 if (!cb->args[0]) {
745 cb->args[0] = 1;
746 xfrm_state_walk_init(walk, 0);
747 }
748
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800749 (void) xfrm_state_walk(net, walk, dump_one_state, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750
751 return skb->len;
752}
753
754static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb,
755 struct xfrm_state *x, u32 seq)
756{
757 struct xfrm_dump_info info;
758 struct sk_buff *skb;
759
Thomas Graf7deb2262007-08-22 13:57:39 -0700760 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 if (!skb)
762 return ERR_PTR(-ENOMEM);
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 info.in_skb = in_skb;
765 info.out_skb = skb;
766 info.nlmsg_seq = seq;
767 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768
769 if (dump_one_state(x, 0, &info)) {
770 kfree_skb(skb);
771 return NULL;
772 }
773
774 return skb;
775}
776
Thomas Graf7deb2262007-08-22 13:57:39 -0700777static inline size_t xfrm_spdinfo_msgsize(void)
778{
779 return NLMSG_ALIGN(4)
780 + nla_total_size(sizeof(struct xfrmu_spdinfo))
781 + nla_total_size(sizeof(struct xfrmu_spdhinfo));
782}
783
Alexey Dobriyane0710412010-01-23 13:37:10 +0000784static int build_spdinfo(struct sk_buff *skb, struct net *net,
785 u32 pid, u32 seq, u32 flags)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700786{
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700787 struct xfrmk_spdinfo si;
788 struct xfrmu_spdinfo spc;
789 struct xfrmu_spdhinfo sph;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700790 struct nlmsghdr *nlh;
791 u32 *f;
792
793 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0);
794 if (nlh == NULL) /* shouldnt really happen ... */
795 return -EMSGSIZE;
796
797 f = nlmsg_data(nlh);
798 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +0000799 xfrm_spd_getinfo(net, &si);
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700800 spc.incnt = si.incnt;
801 spc.outcnt = si.outcnt;
802 spc.fwdcnt = si.fwdcnt;
803 spc.inscnt = si.inscnt;
804 spc.outscnt = si.outscnt;
805 spc.fwdscnt = si.fwdscnt;
806 sph.spdhcnt = si.spdhcnt;
807 sph.spdhmcnt = si.spdhmcnt;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700808
Jamal Hadi Salim5a6d3412007-05-04 12:55:39 -0700809 NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc);
810 NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700811
812 return nlmsg_end(skb, nlh);
813
814nla_put_failure:
815 nlmsg_cancel(skb, nlh);
816 return -EMSGSIZE;
817}
818
819static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700820 struct nlattr **attrs)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700821{
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800822 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700823 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -0700824 u32 *flags = nlmsg_data(nlh);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700825 u32 spid = NETLINK_CB(skb).pid;
826 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700827
Thomas Graf7deb2262007-08-22 13:57:39 -0700828 r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700829 if (r_skb == NULL)
830 return -ENOMEM;
831
Alexey Dobriyane0710412010-01-23 13:37:10 +0000832 if (build_spdinfo(r_skb, net, spid, seq, *flags) < 0)
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700833 BUG();
834
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800835 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -0700836}
837
Thomas Graf7deb2262007-08-22 13:57:39 -0700838static inline size_t xfrm_sadinfo_msgsize(void)
839{
840 return NLMSG_ALIGN(4)
841 + nla_total_size(sizeof(struct xfrmu_sadhinfo))
842 + nla_total_size(4); /* XFRMA_SAD_CNT */
843}
844
Alexey Dobriyane0710412010-01-23 13:37:10 +0000845static int build_sadinfo(struct sk_buff *skb, struct net *net,
846 u32 pid, u32 seq, u32 flags)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700847{
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -0700848 struct xfrmk_sadinfo si;
849 struct xfrmu_sadhinfo sh;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700850 struct nlmsghdr *nlh;
851 u32 *f;
852
853 nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0);
854 if (nlh == NULL) /* shouldnt really happen ... */
855 return -EMSGSIZE;
856
857 f = nlmsg_data(nlh);
858 *f = flags;
Alexey Dobriyane0710412010-01-23 13:37:10 +0000859 xfrm_sad_getinfo(net, &si);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700860
Jamal Hadi Salimaf11e312007-05-04 12:55:13 -0700861 sh.sadhmcnt = si.sadhmcnt;
862 sh.sadhcnt = si.sadhcnt;
863
864 NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt);
865 NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700866
867 return nlmsg_end(skb, nlh);
868
869nla_put_failure:
870 nlmsg_cancel(skb, nlh);
871 return -EMSGSIZE;
872}
873
874static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700875 struct nlattr **attrs)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700876{
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800877 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700878 struct sk_buff *r_skb;
Thomas Graf7b67c852007-08-22 13:53:52 -0700879 u32 *flags = nlmsg_data(nlh);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700880 u32 spid = NETLINK_CB(skb).pid;
881 u32 seq = nlh->nlmsg_seq;
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700882
Thomas Graf7deb2262007-08-22 13:57:39 -0700883 r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700884 if (r_skb == NULL)
885 return -ENOMEM;
886
Alexey Dobriyane0710412010-01-23 13:37:10 +0000887 if (build_sadinfo(r_skb, net, spid, seq, *flags) < 0)
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700888 BUG();
889
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800890 return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid);
Jamal Hadi Salim28d89092007-04-26 00:10:29 -0700891}
892
Christoph Hellwig22e70052007-01-02 15:22:30 -0800893static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700894 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800896 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -0700897 struct xfrm_usersa_id *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 struct xfrm_state *x;
899 struct sk_buff *resp_skb;
Masahide NAKAMURAeb2971b2006-08-23 17:56:04 -0700900 int err = -ESRCH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800902 x = xfrm_user_state_lookup(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 if (x == NULL)
904 goto out_noput;
905
906 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
907 if (IS_ERR(resp_skb)) {
908 err = PTR_ERR(resp_skb);
909 } else {
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800910 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 }
912 xfrm_state_put(x);
913out_noput:
914 return err;
915}
916
917static int verify_userspi_info(struct xfrm_userspi_info *p)
918{
919 switch (p->info.id.proto) {
920 case IPPROTO_AH:
921 case IPPROTO_ESP:
922 break;
923
924 case IPPROTO_COMP:
925 /* IPCOMP spi is 16-bits. */
926 if (p->max >= 0x10000)
927 return -EINVAL;
928 break;
929
930 default:
931 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700932 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
934 if (p->min > p->max)
935 return -EINVAL;
936
937 return 0;
938}
939
Christoph Hellwig22e70052007-01-02 15:22:30 -0800940static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -0700941 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -0800943 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 struct xfrm_state *x;
945 struct xfrm_userspi_info *p;
946 struct sk_buff *resp_skb;
947 xfrm_address_t *daddr;
948 int family;
949 int err;
950
Thomas Graf7b67c852007-08-22 13:53:52 -0700951 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 err = verify_userspi_info(p);
953 if (err)
954 goto out_noput;
955
956 family = p->info.family;
957 daddr = &p->info.id.daddr;
958
959 x = NULL;
960 if (p->info.seq) {
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800961 x = xfrm_find_acq_byseq(net, p->info.seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) {
963 xfrm_state_put(x);
964 x = NULL;
965 }
966 }
967
968 if (!x)
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800969 x = xfrm_find_acq(net, p->info.mode, p->info.reqid,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 p->info.id.proto, daddr,
971 &p->info.saddr, 1,
972 family);
973 err = -ENOENT;
974 if (x == NULL)
975 goto out_noput;
976
Herbert Xu658b2192007-10-09 13:29:52 -0700977 err = xfrm_alloc_spi(x, p->min, p->max);
978 if (err)
979 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
Herbert Xu658b2192007-10-09 13:29:52 -0700981 resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 if (IS_ERR(resp_skb)) {
983 err = PTR_ERR(resp_skb);
984 goto out;
985 }
986
Alexey Dobriyana6483b72008-11-25 17:38:20 -0800987 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988
989out:
990 xfrm_state_put(x);
991out_noput:
992 return err;
993}
994
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -0800995static int verify_policy_dir(u8 dir)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996{
997 switch (dir) {
998 case XFRM_POLICY_IN:
999 case XFRM_POLICY_OUT:
1000 case XFRM_POLICY_FWD:
1001 break;
1002
1003 default:
1004 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001005 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006
1007 return 0;
1008}
1009
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001010static int verify_policy_type(u8 type)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001011{
1012 switch (type) {
1013 case XFRM_POLICY_TYPE_MAIN:
1014#ifdef CONFIG_XFRM_SUB_POLICY
1015 case XFRM_POLICY_TYPE_SUB:
1016#endif
1017 break;
1018
1019 default:
1020 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001021 }
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001022
1023 return 0;
1024}
1025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
1027{
1028 switch (p->share) {
1029 case XFRM_SHARE_ANY:
1030 case XFRM_SHARE_SESSION:
1031 case XFRM_SHARE_USER:
1032 case XFRM_SHARE_UNIQUE:
1033 break;
1034
1035 default:
1036 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001037 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
1039 switch (p->action) {
1040 case XFRM_POLICY_ALLOW:
1041 case XFRM_POLICY_BLOCK:
1042 break;
1043
1044 default:
1045 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001046 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
1048 switch (p->sel.family) {
1049 case AF_INET:
1050 break;
1051
1052 case AF_INET6:
1053#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1054 break;
1055#else
1056 return -EAFNOSUPPORT;
1057#endif
1058
1059 default:
1060 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001061 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
1063 return verify_policy_dir(p->dir);
1064}
1065
Thomas Graf5424f322007-08-22 14:01:33 -07001066static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs)
Trent Jaegerdf718372005-12-13 23:12:27 -08001067{
Thomas Graf5424f322007-08-22 14:01:33 -07001068 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Trent Jaegerdf718372005-12-13 23:12:27 -08001069 struct xfrm_user_sec_ctx *uctx;
1070
1071 if (!rt)
1072 return 0;
1073
Thomas Graf5424f322007-08-22 14:01:33 -07001074 uctx = nla_data(rt);
Paul Moore03e1ad72008-04-12 19:07:52 -07001075 return security_xfrm_policy_alloc(&pol->security, uctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001076}
1077
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
1079 int nr)
1080{
1081 int i;
1082
1083 xp->xfrm_nr = nr;
1084 for (i = 0; i < nr; i++, ut++) {
1085 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1086
1087 memcpy(&t->id, &ut->id, sizeof(struct xfrm_id));
1088 memcpy(&t->saddr, &ut->saddr,
1089 sizeof(xfrm_address_t));
1090 t->reqid = ut->reqid;
1091 t->mode = ut->mode;
1092 t->share = ut->share;
1093 t->optional = ut->optional;
1094 t->aalgos = ut->aalgos;
1095 t->ealgos = ut->ealgos;
1096 t->calgos = ut->calgos;
Herbert Xuc5d18e92008-04-22 00:46:42 -07001097 /* If all masks are ~0, then we allow all algorithms. */
1098 t->allalgs = !~(t->aalgos & t->ealgos & t->calgos);
Miika Komu8511d012006-11-30 16:40:51 -08001099 t->encap_family = ut->family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 }
1101}
1102
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001103static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
1104{
1105 int i;
1106
1107 if (nr > XFRM_MAX_DEPTH)
1108 return -EINVAL;
1109
1110 for (i = 0; i < nr; i++) {
1111 /* We never validated the ut->family value, so many
1112 * applications simply leave it at zero. The check was
1113 * never made and ut->family was ignored because all
1114 * templates could be assumed to have the same family as
1115 * the policy itself. Now that we will have ipv4-in-ipv6
1116 * and ipv6-in-ipv4 tunnels, this is no longer true.
1117 */
1118 if (!ut[i].family)
1119 ut[i].family = family;
1120
1121 switch (ut[i].family) {
1122 case AF_INET:
1123 break;
1124#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
1125 case AF_INET6:
1126 break;
1127#endif
1128 default:
1129 return -EINVAL;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -07001130 }
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001131 }
1132
1133 return 0;
1134}
1135
Thomas Graf5424f322007-08-22 14:01:33 -07001136static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137{
Thomas Graf5424f322007-08-22 14:01:33 -07001138 struct nlattr *rt = attrs[XFRMA_TMPL];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139
1140 if (!rt) {
1141 pol->xfrm_nr = 0;
1142 } else {
Thomas Graf5424f322007-08-22 14:01:33 -07001143 struct xfrm_user_tmpl *utmpl = nla_data(rt);
1144 int nr = nla_len(rt) / sizeof(*utmpl);
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001145 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
David S. Millerb4ad86bf2006-12-03 19:19:26 -08001147 err = validate_tmpl(nr, utmpl, pol->family);
1148 if (err)
1149 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150
Thomas Graf5424f322007-08-22 14:01:33 -07001151 copy_templates(pol, utmpl, nr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 }
1153 return 0;
1154}
1155
Thomas Graf5424f322007-08-22 14:01:33 -07001156static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001157{
Thomas Graf5424f322007-08-22 14:01:33 -07001158 struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001159 struct xfrm_userpolicy_type *upt;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001160 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001161 int err;
1162
1163 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001164 upt = nla_data(rt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001165 type = upt->type;
1166 }
1167
1168 err = verify_policy_type(type);
1169 if (err)
1170 return err;
1171
1172 *tp = type;
1173 return 0;
1174}
1175
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p)
1177{
1178 xp->priority = p->priority;
1179 xp->index = p->index;
1180 memcpy(&xp->selector, &p->sel, sizeof(xp->selector));
1181 memcpy(&xp->lft, &p->lft, sizeof(xp->lft));
1182 xp->action = p->action;
1183 xp->flags = p->flags;
1184 xp->family = p->sel.family;
1185 /* XXX xp->share = p->share; */
1186}
1187
1188static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir)
1189{
1190 memcpy(&p->sel, &xp->selector, sizeof(p->sel));
1191 memcpy(&p->lft, &xp->lft, sizeof(p->lft));
1192 memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft));
1193 p->priority = xp->priority;
1194 p->index = xp->index;
1195 p->sel.family = xp->family;
1196 p->dir = dir;
1197 p->action = xp->action;
1198 p->flags = xp->flags;
1199 p->share = XFRM_SHARE_ANY; /* XXX xp->share */
1200}
1201
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001202static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001204 struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 int err;
1206
1207 if (!xp) {
1208 *errp = -ENOMEM;
1209 return NULL;
1210 }
1211
1212 copy_from_user_policy(xp, p);
Trent Jaegerdf718372005-12-13 23:12:27 -08001213
Thomas Graf35a7aa02007-08-22 14:00:40 -07001214 err = copy_from_user_policy_type(&xp->type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001215 if (err)
1216 goto error;
1217
Thomas Graf35a7aa02007-08-22 14:00:40 -07001218 if (!(err = copy_from_user_tmpl(xp, attrs)))
1219 err = copy_from_user_sec_ctx(xp, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001220 if (err)
1221 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222
1223 return xp;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001224 error:
1225 *errp = err;
Herbert Xu12a169e2008-10-01 07:03:24 -07001226 xp->walk.dead = 1;
WANG Cong64c31b32008-01-07 22:34:29 -08001227 xfrm_policy_destroy(xp);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001228 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229}
1230
Christoph Hellwig22e70052007-01-02 15:22:30 -08001231static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001232 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001234 struct net *net = sock_net(skb->sk);
Thomas Graf7b67c852007-08-22 13:53:52 -07001235 struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 struct xfrm_policy *xp;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001237 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238 int err;
1239 int excl;
Eric Paris25323862008-04-18 10:09:25 -04001240 uid_t loginuid = NETLINK_CB(skb).loginuid;
1241 u32 sessionid = NETLINK_CB(skb).sessionid;
1242 u32 sid = NETLINK_CB(skb).sid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243
1244 err = verify_newpolicy_info(p);
1245 if (err)
1246 return err;
Thomas Graf35a7aa02007-08-22 14:00:40 -07001247 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001248 if (err)
1249 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001251 xp = xfrm_policy_construct(net, p, attrs, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 if (!xp)
1253 return err;
1254
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001255 /* shouldnt excl be based on nlh flags??
1256 * Aha! this is anti-netlink really i.e more pfkey derived
1257 * in netlink excl is a flag and you wouldnt need
1258 * a type XFRM_MSG_UPDPOLICY - JHS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY;
1260 err = xfrm_policy_insert(p->dir, xp, excl);
Eric Paris25323862008-04-18 10:09:25 -04001261 xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001262
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263 if (err) {
Paul Moore03e1ad72008-04-12 19:07:52 -07001264 security_xfrm_policy_free(xp->security);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 kfree(xp);
1266 return err;
1267 }
1268
Herbert Xuf60f6b82005-06-18 22:44:37 -07001269 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001270 c.seq = nlh->nlmsg_seq;
1271 c.pid = nlh->nlmsg_pid;
1272 km_policy_notify(xp, p->dir, &c);
1273
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 xfrm_pol_put(xp);
1275
1276 return 0;
1277}
1278
1279static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb)
1280{
1281 struct xfrm_user_tmpl vec[XFRM_MAX_DEPTH];
1282 int i;
1283
1284 if (xp->xfrm_nr == 0)
1285 return 0;
1286
1287 for (i = 0; i < xp->xfrm_nr; i++) {
1288 struct xfrm_user_tmpl *up = &vec[i];
1289 struct xfrm_tmpl *kp = &xp->xfrm_vec[i];
1290
1291 memcpy(&up->id, &kp->id, sizeof(up->id));
Miika Komu8511d012006-11-30 16:40:51 -08001292 up->family = kp->encap_family;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001293 memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr));
1294 up->reqid = kp->reqid;
1295 up->mode = kp->mode;
1296 up->share = kp->share;
1297 up->optional = kp->optional;
1298 up->aalgos = kp->aalgos;
1299 up->ealgos = kp->ealgos;
1300 up->calgos = kp->calgos;
1301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Thomas Grafc0144be2007-08-22 13:55:43 -07001303 return nla_put(skb, XFRMA_TMPL,
1304 sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec);
Trent Jaegerdf718372005-12-13 23:12:27 -08001305}
1306
Serge Hallyn0d681622006-07-24 23:30:44 -07001307static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb)
1308{
1309 if (x->security) {
1310 return copy_sec_ctx(x->security, skb);
1311 }
1312 return 0;
1313}
1314
1315static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb)
1316{
1317 if (xp->security) {
1318 return copy_sec_ctx(xp->security, skb);
1319 }
1320 return 0;
1321}
Thomas Grafcfbfd452007-08-22 13:57:04 -07001322static inline size_t userpolicy_type_attrsize(void)
1323{
1324#ifdef CONFIG_XFRM_SUB_POLICY
1325 return nla_total_size(sizeof(struct xfrm_userpolicy_type));
1326#else
1327 return 0;
1328#endif
1329}
Serge Hallyn0d681622006-07-24 23:30:44 -07001330
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001331#ifdef CONFIG_XFRM_SUB_POLICY
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001332static int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001333{
Thomas Grafc0144be2007-08-22 13:55:43 -07001334 struct xfrm_userpolicy_type upt = {
1335 .type = type,
1336 };
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001337
Thomas Grafc0144be2007-08-22 13:55:43 -07001338 return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001339}
1340
1341#else
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001342static inline int copy_to_user_policy_type(u8 type, struct sk_buff *skb)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001343{
1344 return 0;
1345}
1346#endif
1347
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr)
1349{
1350 struct xfrm_dump_info *sp = ptr;
1351 struct xfrm_userpolicy_info *p;
1352 struct sk_buff *in_skb = sp->in_skb;
1353 struct sk_buff *skb = sp->out_skb;
1354 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001356 nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq,
1357 XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags);
1358 if (nlh == NULL)
1359 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360
Thomas Graf7b67c852007-08-22 13:53:52 -07001361 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 copy_to_user_policy(xp, p, dir);
1363 if (copy_to_user_tmpl(xp, skb) < 0)
1364 goto nlmsg_failure;
Trent Jaegerdf718372005-12-13 23:12:27 -08001365 if (copy_to_user_sec_ctx(xp, skb))
1366 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08001367 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001368 goto nlmsg_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
Thomas Graf98250692007-08-22 12:47:26 -07001370 nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 return 0;
1372
1373nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07001374 nlmsg_cancel(skb, nlh);
1375 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376}
1377
Timo Teras4c563f72008-02-28 21:31:08 -08001378static int xfrm_dump_policy_done(struct netlink_callback *cb)
1379{
1380 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
1381
1382 xfrm_policy_walk_done(walk);
1383 return 0;
1384}
1385
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb)
1387{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001388 struct net *net = sock_net(skb->sk);
Timo Teras4c563f72008-02-28 21:31:08 -08001389 struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001390 struct xfrm_dump_info info;
1391
Timo Teras4c563f72008-02-28 21:31:08 -08001392 BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) >
1393 sizeof(cb->args) - sizeof(cb->args[0]));
1394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 info.in_skb = cb->skb;
1396 info.out_skb = skb;
1397 info.nlmsg_seq = cb->nlh->nlmsg_seq;
1398 info.nlmsg_flags = NLM_F_MULTI;
Timo Teras4c563f72008-02-28 21:31:08 -08001399
1400 if (!cb->args[0]) {
1401 cb->args[0] = 1;
1402 xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY);
1403 }
1404
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001405 (void) xfrm_policy_walk(net, walk, dump_one_policy, &info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406
1407 return skb->len;
1408}
1409
1410static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb,
1411 struct xfrm_policy *xp,
1412 int dir, u32 seq)
1413{
1414 struct xfrm_dump_info info;
1415 struct sk_buff *skb;
1416
Thomas Graf7deb2262007-08-22 13:57:39 -07001417 skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 if (!skb)
1419 return ERR_PTR(-ENOMEM);
1420
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 info.in_skb = in_skb;
1422 info.out_skb = skb;
1423 info.nlmsg_seq = seq;
1424 info.nlmsg_flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425
1426 if (dump_one_policy(xp, dir, 0, &info) < 0) {
1427 kfree_skb(skb);
1428 return NULL;
1429 }
1430
1431 return skb;
1432}
1433
Christoph Hellwig22e70052007-01-02 15:22:30 -08001434static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001435 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001437 struct net *net = sock_net(skb->sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 struct xfrm_policy *xp;
1439 struct xfrm_userpolicy_id *p;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001440 u8 type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 int err;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001442 struct km_event c;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 int delete;
1444
Thomas Graf7b67c852007-08-22 13:53:52 -07001445 p = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
1447
Thomas Graf35a7aa02007-08-22 14:00:40 -07001448 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001449 if (err)
1450 return err;
1451
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 err = verify_policy_dir(p->dir);
1453 if (err)
1454 return err;
1455
1456 if (p->index)
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001457 xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err);
Trent Jaegerdf718372005-12-13 23:12:27 -08001458 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001459 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001460 struct xfrm_sec_ctx *ctx;
Trent Jaegerdf718372005-12-13 23:12:27 -08001461
Thomas Graf35a7aa02007-08-22 14:00:40 -07001462 err = verify_sec_ctx_len(attrs);
Trent Jaegerdf718372005-12-13 23:12:27 -08001463 if (err)
1464 return err;
1465
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001466 ctx = NULL;
Trent Jaegerdf718372005-12-13 23:12:27 -08001467 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001468 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Trent Jaegerdf718372005-12-13 23:12:27 -08001469
Paul Moore03e1ad72008-04-12 19:07:52 -07001470 err = security_xfrm_policy_alloc(&ctx, uctx);
1471 if (err)
Trent Jaegerdf718372005-12-13 23:12:27 -08001472 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001473 }
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001474 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx,
Eric Parisef41aaa2007-03-07 15:37:58 -08001475 delete, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001476 security_xfrm_policy_free(ctx);
Trent Jaegerdf718372005-12-13 23:12:27 -08001477 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 if (xp == NULL)
1479 return -ENOENT;
1480
1481 if (!delete) {
1482 struct sk_buff *resp_skb;
1483
1484 resp_skb = xfrm_policy_netlink(skb, xp, p->dir, nlh->nlmsg_seq);
1485 if (IS_ERR(resp_skb)) {
1486 err = PTR_ERR(resp_skb);
1487 } else {
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001488 err = nlmsg_unicast(net->xfrm.nlsk, resp_skb,
Thomas Graf082a1ad2007-08-22 13:54:36 -07001489 NETLINK_CB(skb).pid);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001491 } else {
Eric Paris25323862008-04-18 10:09:25 -04001492 uid_t loginuid = NETLINK_CB(skb).loginuid;
1493 u32 sessionid = NETLINK_CB(skb).sessionid;
1494 u32 sid = NETLINK_CB(skb).sid;
1495
1496 xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid,
1497 sid);
David S. Miller13fcfbb02007-02-12 13:53:54 -08001498
1499 if (err != 0)
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001500 goto out;
David S. Miller13fcfbb02007-02-12 13:53:54 -08001501
Herbert Xue7443892005-06-18 22:44:18 -07001502 c.data.byid = p->index;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001503 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001504 c.seq = nlh->nlmsg_seq;
1505 c.pid = nlh->nlmsg_pid;
1506 km_policy_notify(xp, p->dir, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 }
1508
Catherine Zhangc8c05a82006-06-08 23:39:49 -07001509out:
Eric Parisef41aaa2007-03-07 15:37:58 -08001510 xfrm_pol_put(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511 return err;
1512}
1513
Christoph Hellwig22e70052007-01-02 15:22:30 -08001514static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001515 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001517 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001518 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -07001519 struct xfrm_usersa_flush *p = nlmsg_data(nlh);
Joy Latten161a09e2006-11-27 13:11:54 -06001520 struct xfrm_audit audit_info;
Joy Latten4aa2e622007-06-04 19:05:57 -04001521 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522
Joy Latten161a09e2006-11-27 13:11:54 -06001523 audit_info.loginuid = NETLINK_CB(skb).loginuid;
Eric Paris25323862008-04-18 10:09:25 -04001524 audit_info.sessionid = NETLINK_CB(skb).sessionid;
Joy Latten161a09e2006-11-27 13:11:54 -06001525 audit_info.secid = NETLINK_CB(skb).sid;
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001526 err = xfrm_state_flush(net, p->proto, &audit_info);
Joy Latten4aa2e622007-06-04 19:05:57 -04001527 if (err)
David S. Miller069c4742010-02-17 13:41:40 -08001528 return err;
Herbert Xubf088672005-06-18 22:44:00 -07001529 c.data.proto = p->proto;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001530 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001531 c.seq = nlh->nlmsg_seq;
1532 c.pid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001533 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001534 km_state_notify(NULL, &c);
1535
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536 return 0;
1537}
1538
Thomas Graf7deb2262007-08-22 13:57:39 -07001539static inline size_t xfrm_aevent_msgsize(void)
1540{
1541 return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id))
1542 + nla_total_size(sizeof(struct xfrm_replay_state))
1543 + nla_total_size(sizeof(struct xfrm_lifetime_cur))
1544 + nla_total_size(4) /* XFRM_AE_RTHR */
1545 + nla_total_size(4); /* XFRM_AE_ETHR */
1546}
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001547
1548static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
1549{
1550 struct xfrm_aevent_id *id;
1551 struct nlmsghdr *nlh;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001552
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001553 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0);
1554 if (nlh == NULL)
1555 return -EMSGSIZE;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001556
Thomas Graf7b67c852007-08-22 13:53:52 -07001557 id = nlmsg_data(nlh);
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001558 memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr));
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001559 id->sa_id.spi = x->id.spi;
1560 id->sa_id.family = x->props.family;
1561 id->sa_id.proto = x->id.proto;
Jamal Hadi Salim2b5f6dc2006-12-02 22:22:25 -08001562 memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr));
1563 id->reqid = x->props.reqid;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001564 id->flags = c->data.aevent;
1565
Thomas Grafc0144be2007-08-22 13:55:43 -07001566 NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay);
1567 NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001568
Thomas Grafc0144be2007-08-22 13:55:43 -07001569 if (id->flags & XFRM_AE_RTHR)
1570 NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001571
Thomas Grafc0144be2007-08-22 13:55:43 -07001572 if (id->flags & XFRM_AE_ETHR)
1573 NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH,
1574 x->replay_maxage * 10 / HZ);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001575
Thomas Graf98250692007-08-22 12:47:26 -07001576 return nlmsg_end(skb, nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001577
Thomas Grafc0144be2007-08-22 13:55:43 -07001578nla_put_failure:
Thomas Graf98250692007-08-22 12:47:26 -07001579 nlmsg_cancel(skb, nlh);
1580 return -EMSGSIZE;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001581}
1582
Christoph Hellwig22e70052007-01-02 15:22:30 -08001583static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001584 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001585{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001586 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001587 struct xfrm_state *x;
1588 struct sk_buff *r_skb;
1589 int err;
1590 struct km_event c;
Thomas Graf7b67c852007-08-22 13:53:52 -07001591 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001592 struct xfrm_usersa_id *id = &p->sa_id;
1593
Thomas Graf7deb2262007-08-22 13:57:39 -07001594 r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001595 if (r_skb == NULL)
1596 return -ENOMEM;
1597
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001598 x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001599 if (x == NULL) {
Patrick McHardyb08d5842007-02-27 09:57:37 -08001600 kfree_skb(r_skb);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001601 return -ESRCH;
1602 }
1603
1604 /*
1605 * XXX: is this lock really needed - none of the other
1606 * gets lock (the concern is things getting updated
1607 * while we are still reading) - jhs
1608 */
1609 spin_lock_bh(&x->lock);
1610 c.data.aevent = p->flags;
1611 c.seq = nlh->nlmsg_seq;
1612 c.pid = nlh->nlmsg_pid;
1613
1614 if (build_aevent(r_skb, x, &c) < 0)
1615 BUG();
Alexey Dobriyana6483b72008-11-25 17:38:20 -08001616 err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001617 spin_unlock_bh(&x->lock);
1618 xfrm_state_put(x);
1619 return err;
1620}
1621
Christoph Hellwig22e70052007-01-02 15:22:30 -08001622static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001623 struct nlattr **attrs)
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001624{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001625 struct net *net = sock_net(skb->sk);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001626 struct xfrm_state *x;
1627 struct km_event c;
1628 int err = - EINVAL;
Thomas Graf7b67c852007-08-22 13:53:52 -07001629 struct xfrm_aevent_id *p = nlmsg_data(nlh);
Thomas Graf5424f322007-08-22 14:01:33 -07001630 struct nlattr *rp = attrs[XFRMA_REPLAY_VAL];
1631 struct nlattr *lt = attrs[XFRMA_LTIME_VAL];
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001632
1633 if (!lt && !rp)
1634 return err;
1635
1636 /* pedantic mode - thou shalt sayeth replaceth */
1637 if (!(nlh->nlmsg_flags&NLM_F_REPLACE))
1638 return err;
1639
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001640 x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001641 if (x == NULL)
1642 return -ESRCH;
1643
1644 if (x->km.state != XFRM_STATE_VALID)
1645 goto out;
1646
1647 spin_lock_bh(&x->lock);
Thomas Graf35a7aa02007-08-22 14:00:40 -07001648 xfrm_update_ae_params(x, attrs);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001649 spin_unlock_bh(&x->lock);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08001650
1651 c.event = nlh->nlmsg_type;
1652 c.seq = nlh->nlmsg_seq;
1653 c.pid = nlh->nlmsg_pid;
1654 c.data.aevent = XFRM_AE_CU;
1655 km_state_notify(x, &c);
1656 err = 0;
1657out:
1658 xfrm_state_put(x);
1659 return err;
1660}
1661
Christoph Hellwig22e70052007-01-02 15:22:30 -08001662static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001663 struct nlattr **attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001664{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001665 struct net *net = sock_net(skb->sk);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001666 struct km_event c;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001667 u8 type = XFRM_POLICY_TYPE_MAIN;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001668 int err;
Joy Latten161a09e2006-11-27 13:11:54 -06001669 struct xfrm_audit audit_info;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001670
Thomas Graf35a7aa02007-08-22 14:00:40 -07001671 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001672 if (err)
1673 return err;
1674
Joy Latten161a09e2006-11-27 13:11:54 -06001675 audit_info.loginuid = NETLINK_CB(skb).loginuid;
Eric Paris25323862008-04-18 10:09:25 -04001676 audit_info.sessionid = NETLINK_CB(skb).sessionid;
Joy Latten161a09e2006-11-27 13:11:54 -06001677 audit_info.secid = NETLINK_CB(skb).sid;
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001678 err = xfrm_policy_flush(net, type, &audit_info);
Joy Latten4aa2e622007-06-04 19:05:57 -04001679 if (err)
David S. Miller069c4742010-02-17 13:41:40 -08001680 return err;
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001681 c.data.type = type;
Herbert Xuf60f6b82005-06-18 22:44:37 -07001682 c.event = nlh->nlmsg_type;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001683 c.seq = nlh->nlmsg_seq;
1684 c.pid = nlh->nlmsg_pid;
Alexey Dobriyan70678022008-11-25 17:50:36 -08001685 c.net = net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07001686 km_policy_notify(NULL, 0, &c);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 return 0;
1688}
1689
Christoph Hellwig22e70052007-01-02 15:22:30 -08001690static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001691 struct nlattr **attrs)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001692{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001693 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001694 struct xfrm_policy *xp;
Thomas Graf7b67c852007-08-22 13:53:52 -07001695 struct xfrm_user_polexpire *up = nlmsg_data(nlh);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001696 struct xfrm_userpolicy_info *p = &up->pol;
Jamal Hadi Salimb798a9e2006-11-27 12:59:30 -08001697 u8 type = XFRM_POLICY_TYPE_MAIN;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001698 int err = -ENOENT;
1699
Thomas Graf35a7aa02007-08-22 14:00:40 -07001700 err = copy_from_user_policy_type(&type, attrs);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07001701 if (err)
1702 return err;
1703
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001704 if (p->index)
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001705 xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001706 else {
Thomas Graf5424f322007-08-22 14:01:33 -07001707 struct nlattr *rt = attrs[XFRMA_SEC_CTX];
Paul Moore03e1ad72008-04-12 19:07:52 -07001708 struct xfrm_sec_ctx *ctx;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001709
Thomas Graf35a7aa02007-08-22 14:00:40 -07001710 err = verify_sec_ctx_len(attrs);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001711 if (err)
1712 return err;
1713
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001714 ctx = NULL;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001715 if (rt) {
Thomas Graf5424f322007-08-22 14:01:33 -07001716 struct xfrm_user_sec_ctx *uctx = nla_data(rt);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001717
Paul Moore03e1ad72008-04-12 19:07:52 -07001718 err = security_xfrm_policy_alloc(&ctx, uctx);
1719 if (err)
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001720 return err;
Denis V. Lunev2c8dd112008-04-14 14:47:48 -07001721 }
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001722 xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err);
Paul Moore03e1ad72008-04-12 19:07:52 -07001723 security_xfrm_policy_free(ctx);
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001724 }
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001725 if (xp == NULL)
Eric Parisef41aaa2007-03-07 15:37:58 -08001726 return -ENOENT;
Paul Moore03e1ad72008-04-12 19:07:52 -07001727
Eric Parisef41aaa2007-03-07 15:37:58 -08001728 read_lock(&xp->lock);
Herbert Xu12a169e2008-10-01 07:03:24 -07001729 if (xp->walk.dead) {
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001730 read_unlock(&xp->lock);
1731 goto out;
1732 }
1733
1734 read_unlock(&xp->lock);
1735 err = 0;
1736 if (up->hard) {
Eric Paris25323862008-04-18 10:09:25 -04001737 uid_t loginuid = NETLINK_CB(skb).loginuid;
1738 uid_t sessionid = NETLINK_CB(skb).sessionid;
1739 u32 sid = NETLINK_CB(skb).sid;
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001740 xfrm_policy_delete(xp, p->dir);
Eric Paris25323862008-04-18 10:09:25 -04001741 xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001742
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08001743 } else {
1744 // reset the timers here?
1745 printk("Dont know what to do with soft policy expire\n");
1746 }
1747 km_policy_expired(xp, p->dir, up->hard, current->pid);
1748
1749out:
1750 xfrm_pol_put(xp);
1751 return err;
1752}
1753
Christoph Hellwig22e70052007-01-02 15:22:30 -08001754static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001755 struct nlattr **attrs)
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001756{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001757 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001758 struct xfrm_state *x;
1759 int err;
Thomas Graf7b67c852007-08-22 13:53:52 -07001760 struct xfrm_user_expire *ue = nlmsg_data(nlh);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001761 struct xfrm_usersa_info *p = &ue->state;
1762
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001763 x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family);
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001764
David S. Miller3a765aa2007-02-26 14:52:21 -08001765 err = -ENOENT;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001766 if (x == NULL)
1767 return err;
1768
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001769 spin_lock_bh(&x->lock);
David S. Miller3a765aa2007-02-26 14:52:21 -08001770 err = -EINVAL;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001771 if (x->km.state != XFRM_STATE_VALID)
1772 goto out;
1773 km_state_expired(x, ue->hard, current->pid);
1774
Joy Latten161a09e2006-11-27 13:11:54 -06001775 if (ue->hard) {
Eric Paris25323862008-04-18 10:09:25 -04001776 uid_t loginuid = NETLINK_CB(skb).loginuid;
1777 uid_t sessionid = NETLINK_CB(skb).sessionid;
1778 u32 sid = NETLINK_CB(skb).sid;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001779 __xfrm_state_delete(x);
Eric Paris25323862008-04-18 10:09:25 -04001780 xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid);
Joy Latten161a09e2006-11-27 13:11:54 -06001781 }
David S. Miller3a765aa2007-02-26 14:52:21 -08001782 err = 0;
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08001783out:
1784 spin_unlock_bh(&x->lock);
1785 xfrm_state_put(x);
1786 return err;
1787}
1788
Christoph Hellwig22e70052007-01-02 15:22:30 -08001789static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001790 struct nlattr **attrs)
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001791{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001792 struct net *net = sock_net(skb->sk);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001793 struct xfrm_policy *xp;
1794 struct xfrm_user_tmpl *ut;
1795 int i;
Thomas Graf5424f322007-08-22 14:01:33 -07001796 struct nlattr *rt = attrs[XFRMA_TMPL];
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001797
Thomas Graf7b67c852007-08-22 13:53:52 -07001798 struct xfrm_user_acquire *ua = nlmsg_data(nlh);
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001799 struct xfrm_state *x = xfrm_state_alloc(net);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001800 int err = -ENOMEM;
1801
1802 if (!x)
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001803 goto nomem;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001804
1805 err = verify_newpolicy_info(&ua->policy);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001806 if (err)
1807 goto bad_policy;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001808
1809 /* build an XP */
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08001810 xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001811 if (!xp)
1812 goto free_state;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001813
1814 memcpy(&x->id, &ua->id, sizeof(ua->id));
1815 memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr));
1816 memcpy(&x->sel, &ua->sel, sizeof(ua->sel));
1817
Thomas Graf5424f322007-08-22 14:01:33 -07001818 ut = nla_data(rt);
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001819 /* extract the templates and for each call km_key */
1820 for (i = 0; i < xp->xfrm_nr; i++, ut++) {
1821 struct xfrm_tmpl *t = &xp->xfrm_vec[i];
1822 memcpy(&x->id, &t->id, sizeof(x->id));
1823 x->props.mode = t->mode;
1824 x->props.reqid = t->reqid;
1825 x->props.family = ut->family;
1826 t->aalgos = ua->aalgos;
1827 t->ealgos = ua->ealgos;
1828 t->calgos = ua->calgos;
1829 err = km_query(x, t, xp);
1830
1831 }
1832
1833 kfree(x);
1834 kfree(xp);
1835
1836 return 0;
Ilpo Järvinend8eb9302008-12-14 23:16:22 -08001837
1838bad_policy:
1839 printk("BAD policy passed\n");
1840free_state:
1841 kfree(x);
1842nomem:
1843 return err;
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08001844}
1845
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001846#ifdef CONFIG_XFRM_MIGRATE
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001847static int copy_from_user_migrate(struct xfrm_migrate *ma,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001848 struct xfrm_kmaddress *k,
Thomas Graf5424f322007-08-22 14:01:33 -07001849 struct nlattr **attrs, int *num)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001850{
Thomas Graf5424f322007-08-22 14:01:33 -07001851 struct nlattr *rt = attrs[XFRMA_MIGRATE];
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001852 struct xfrm_user_migrate *um;
1853 int i, num_migrate;
1854
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001855 if (k != NULL) {
1856 struct xfrm_user_kmaddress *uk;
1857
1858 uk = nla_data(attrs[XFRMA_KMADDRESS]);
1859 memcpy(&k->local, &uk->local, sizeof(k->local));
1860 memcpy(&k->remote, &uk->remote, sizeof(k->remote));
1861 k->family = uk->family;
1862 k->reserved = uk->reserved;
1863 }
1864
Thomas Graf5424f322007-08-22 14:01:33 -07001865 um = nla_data(rt);
1866 num_migrate = nla_len(rt) / sizeof(*um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001867
1868 if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH)
1869 return -EINVAL;
1870
1871 for (i = 0; i < num_migrate; i++, um++, ma++) {
1872 memcpy(&ma->old_daddr, &um->old_daddr, sizeof(ma->old_daddr));
1873 memcpy(&ma->old_saddr, &um->old_saddr, sizeof(ma->old_saddr));
1874 memcpy(&ma->new_daddr, &um->new_daddr, sizeof(ma->new_daddr));
1875 memcpy(&ma->new_saddr, &um->new_saddr, sizeof(ma->new_saddr));
1876
1877 ma->proto = um->proto;
1878 ma->mode = um->mode;
1879 ma->reqid = um->reqid;
1880
1881 ma->old_family = um->old_family;
1882 ma->new_family = um->new_family;
1883 }
1884
1885 *num = i;
1886 return 0;
1887}
1888
1889static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001890 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001891{
Thomas Graf7b67c852007-08-22 13:53:52 -07001892 struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001893 struct xfrm_migrate m[XFRM_MAX_DEPTH];
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001894 struct xfrm_kmaddress km, *kmp;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001895 u8 type;
1896 int err;
1897 int n = 0;
1898
Thomas Graf35a7aa02007-08-22 14:00:40 -07001899 if (attrs[XFRMA_MIGRATE] == NULL)
Thomas Grafcf5cb792007-08-22 13:59:04 -07001900 return -EINVAL;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001901
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001902 kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
1903
Thomas Graf5424f322007-08-22 14:01:33 -07001904 err = copy_from_user_policy_type(&type, attrs);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001905 if (err)
1906 return err;
1907
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001908 err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001909 if (err)
1910 return err;
1911
1912 if (!n)
1913 return 0;
1914
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001915 xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001916
1917 return 0;
1918}
1919#else
1920static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
Thomas Graf5424f322007-08-22 14:01:33 -07001921 struct nlattr **attrs)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001922{
1923 return -ENOPROTOOPT;
1924}
1925#endif
1926
1927#ifdef CONFIG_XFRM_MIGRATE
1928static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb)
1929{
1930 struct xfrm_user_migrate um;
1931
1932 memset(&um, 0, sizeof(um));
1933 um.proto = m->proto;
1934 um.mode = m->mode;
1935 um.reqid = m->reqid;
1936 um.old_family = m->old_family;
1937 memcpy(&um.old_daddr, &m->old_daddr, sizeof(um.old_daddr));
1938 memcpy(&um.old_saddr, &m->old_saddr, sizeof(um.old_saddr));
1939 um.new_family = m->new_family;
1940 memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr));
1941 memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr));
1942
Thomas Grafc0144be2007-08-22 13:55:43 -07001943 return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001944}
1945
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001946static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
1947{
1948 struct xfrm_user_kmaddress uk;
1949
1950 memset(&uk, 0, sizeof(uk));
1951 uk.family = k->family;
1952 uk.reserved = k->reserved;
1953 memcpy(&uk.local, &k->local, sizeof(uk.local));
Arnaud Ebalarda1caa322008-11-03 01:30:23 -08001954 memcpy(&uk.remote, &k->remote, sizeof(uk.remote));
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001955
1956 return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
1957}
1958
1959static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma)
Thomas Graf7deb2262007-08-22 13:57:39 -07001960{
1961 return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id))
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001962 + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0)
1963 + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate)
1964 + userpolicy_type_attrsize();
Thomas Graf7deb2262007-08-22 13:57:39 -07001965}
1966
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001967static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001968 int num_migrate, struct xfrm_kmaddress *k,
1969 struct xfrm_selector *sel, u8 dir, u8 type)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001970{
1971 struct xfrm_migrate *mp;
1972 struct xfrm_userpolicy_id *pol_id;
1973 struct nlmsghdr *nlh;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001974 int i;
1975
Thomas Graf79b8b7f2007-08-22 12:46:53 -07001976 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0);
1977 if (nlh == NULL)
1978 return -EMSGSIZE;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001979
Thomas Graf7b67c852007-08-22 13:53:52 -07001980 pol_id = nlmsg_data(nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001981 /* copy data from selector, dir, and type to the pol_id */
1982 memset(pol_id, 0, sizeof(*pol_id));
1983 memcpy(&pol_id->sel, sel, sizeof(pol_id->sel));
1984 pol_id->dir = dir;
1985
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07001986 if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0))
1987 goto nlmsg_failure;
1988
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001989 if (copy_to_user_policy_type(type, skb) < 0)
1990 goto nlmsg_failure;
1991
1992 for (i = 0, mp = m ; i < num_migrate; i++, mp++) {
1993 if (copy_to_user_migrate(mp, skb) < 0)
1994 goto nlmsg_failure;
1995 }
1996
Thomas Graf98250692007-08-22 12:47:26 -07001997 return nlmsg_end(skb, nlh);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08001998nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07001999 nlmsg_cancel(skb, nlh);
2000 return -EMSGSIZE;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002001}
2002
2003static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002004 struct xfrm_migrate *m, int num_migrate,
2005 struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002006{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002007 struct net *net = &init_net;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002008 struct sk_buff *skb;
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002009
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002010 skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002011 if (skb == NULL)
2012 return -ENOMEM;
2013
2014 /* build migrate */
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002015 if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002016 BUG();
2017
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002018 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC);
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002019}
2020#else
2021static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type,
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002022 struct xfrm_migrate *m, int num_migrate,
2023 struct xfrm_kmaddress *k)
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002024{
2025 return -ENOPROTOOPT;
2026}
2027#endif
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002028
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002029#define XMSGSIZE(type) sizeof(struct type)
Thomas Graf492b5582005-05-03 14:26:40 -07002030
2031static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = {
David S. Miller66f9a252009-01-20 09:49:51 -08002032 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Thomas Graf492b5582005-05-03 14:26:40 -07002033 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2034 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_id),
2035 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
2036 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2037 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
2038 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userspi_info),
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002039 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_acquire),
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002040 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_expire),
Thomas Graf492b5582005-05-03 14:26:40 -07002041 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_info),
David S. Miller66f9a252009-01-20 09:49:51 -08002042 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info),
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002043 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire),
Thomas Graf492b5582005-05-03 14:26:40 -07002044 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002045 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0,
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002046 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
2047 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id),
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002048 [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report),
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002049 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id),
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002050 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32),
2051 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32),
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052};
2053
Thomas Graf492b5582005-05-03 14:26:40 -07002054#undef XMSGSIZE
2055
Thomas Grafcf5cb792007-08-22 13:59:04 -07002056static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
jamalc28e9302010-02-09 03:59:38 +00002057 [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)},
2058 [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)},
2059 [XFRMA_LASTUSED] = { .type = NLA_U64},
2060 [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)},
Herbert Xu1a6509d2008-01-28 19:37:29 -08002061 [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002062 [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) },
2063 [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) },
2064 [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
2065 [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
2066 [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
2067 [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
2068 [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
2069 [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
2070 [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
2071 [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 },
2072 [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) },
2073 [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) },
2074 [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)},
2075 [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) },
Arnaud Ebalard13c1d182008-10-05 13:33:42 -07002076 [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) },
Thomas Grafcf5cb792007-08-22 13:59:04 -07002077};
2078
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079static struct xfrm_link {
Thomas Graf5424f322007-08-22 14:01:33 -07002080 int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081 int (*dump)(struct sk_buff *, struct netlink_callback *);
Timo Teras4c563f72008-02-28 21:31:08 -08002082 int (*done)(struct netlink_callback *);
Thomas Graf492b5582005-05-03 14:26:40 -07002083} xfrm_dispatch[XFRM_NR_MSGTYPES] = {
2084 [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
2085 [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa },
2086 [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa,
Timo Teras4c563f72008-02-28 21:31:08 -08002087 .dump = xfrm_dump_sa,
2088 .done = xfrm_dump_sa_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002089 [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2090 [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy },
2091 [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy,
Timo Teras4c563f72008-02-28 21:31:08 -08002092 .dump = xfrm_dump_policy,
2093 .done = xfrm_dump_policy_done },
Thomas Graf492b5582005-05-03 14:26:40 -07002094 [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi },
Jamal Hadi Salim980ebd22006-03-20 19:16:40 -08002095 [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire },
Jamal Hadi Salim53bc6b42006-03-20 19:17:03 -08002096 [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire },
Thomas Graf492b5582005-05-03 14:26:40 -07002097 [XFRM_MSG_UPDPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy },
2098 [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa },
Jamal Hadi Salim6c5c8ca2006-03-20 19:17:25 -08002099 [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_pol_expire},
Thomas Graf492b5582005-05-03 14:26:40 -07002100 [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = { .doit = xfrm_flush_sa },
2101 [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_flush_policy },
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002102 [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = { .doit = xfrm_new_ae },
2103 [XFRM_MSG_GETAE - XFRM_MSG_BASE] = { .doit = xfrm_get_ae },
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002104 [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = { .doit = xfrm_do_migrate },
Jamal Hadi Salim566ec032007-04-26 14:12:15 -07002105 [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_sadinfo },
Jamal Hadi Salimecfd6b12007-04-28 21:20:32 -07002106 [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = { .doit = xfrm_get_spdinfo },
Linus Torvalds1da177e2005-04-16 15:20:36 -07002107};
2108
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002109static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002110{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002111 struct net *net = sock_net(skb->sk);
Thomas Graf35a7aa02007-08-22 14:00:40 -07002112 struct nlattr *attrs[XFRMA_MAX+1];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002113 struct xfrm_link *link;
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002114 int type, err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 type = nlh->nlmsg_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002117 if (type > XFRM_MSG_MAX)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002118 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119
2120 type -= XFRM_MSG_BASE;
2121 link = &xfrm_dispatch[type];
2122
2123 /* All operations require privileges, even GET */
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002124 if (security_netlink_recv(skb, CAP_NET_ADMIN))
2125 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126
Thomas Graf492b5582005-05-03 14:26:40 -07002127 if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) ||
2128 type == (XFRM_MSG_GETPOLICY - XFRM_MSG_BASE)) &&
2129 (nlh->nlmsg_flags & NLM_F_DUMP)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002130 if (link->dump == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002131 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002132
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002133 return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002134 }
2135
Thomas Graf35a7aa02007-08-22 14:00:40 -07002136 err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX,
Thomas Grafcf5cb792007-08-22 13:59:04 -07002137 xfrma_policy);
Thomas Grafa7bd9a42007-08-22 13:58:18 -07002138 if (err < 0)
2139 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140
2141 if (link->doit == NULL)
Thomas Graf1d00a4e2007-03-22 23:30:12 -07002142 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002143
Thomas Graf5424f322007-08-22 14:01:33 -07002144 return link->doit(skb, nlh, attrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145}
2146
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002147static void xfrm_netlink_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148{
Denis V. Lunevcd40b7d2007-10-10 21:15:29 -07002149 mutex_lock(&xfrm_cfg_mutex);
2150 netlink_rcv_skb(skb, &xfrm_user_rcv_msg);
2151 mutex_unlock(&xfrm_cfg_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002152}
2153
Thomas Graf7deb2262007-08-22 13:57:39 -07002154static inline size_t xfrm_expire_msgsize(void)
2155{
2156 return NLMSG_ALIGN(sizeof(struct xfrm_user_expire));
2157}
2158
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002159static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160{
2161 struct xfrm_user_expire *ue;
2162 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002164 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0);
2165 if (nlh == NULL)
2166 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002167
Thomas Graf7b67c852007-08-22 13:53:52 -07002168 ue = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169 copy_to_user_state(x, &ue->state);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002170 ue->hard = (c->data.hard != 0) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171
Thomas Graf98250692007-08-22 12:47:26 -07002172 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173}
2174
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002175static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002176{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002177 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002178 struct sk_buff *skb;
2179
Thomas Graf7deb2262007-08-22 13:57:39 -07002180 skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002181 if (skb == NULL)
2182 return -ENOMEM;
2183
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002184 if (build_expire(skb, x, c) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002185 BUG();
2186
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002187 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188}
2189
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002190static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c)
2191{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002192 struct net *net = xs_net(x);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002193 struct sk_buff *skb;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002194
Thomas Graf7deb2262007-08-22 13:57:39 -07002195 skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002196 if (skb == NULL)
2197 return -ENOMEM;
2198
2199 if (build_aevent(skb, x, c) < 0)
2200 BUG();
2201
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002202 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002203}
2204
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002205static int xfrm_notify_sa_flush(struct km_event *c)
2206{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002207 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002208 struct xfrm_usersa_flush *p;
2209 struct nlmsghdr *nlh;
2210 struct sk_buff *skb;
Thomas Graf7deb2262007-08-22 13:57:39 -07002211 int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002212
Thomas Graf7deb2262007-08-22 13:57:39 -07002213 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002214 if (skb == NULL)
2215 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002216
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002217 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0);
2218 if (nlh == NULL) {
2219 kfree_skb(skb);
2220 return -EMSGSIZE;
2221 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002222
Thomas Graf7b67c852007-08-22 13:53:52 -07002223 p = nlmsg_data(nlh);
Herbert Xubf088672005-06-18 22:44:00 -07002224 p->proto = c->data.proto;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002225
Thomas Graf98250692007-08-22 12:47:26 -07002226 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002227
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002228 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002229}
2230
Thomas Graf7deb2262007-08-22 13:57:39 -07002231static inline size_t xfrm_sa_len(struct xfrm_state *x)
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002232{
Thomas Graf7deb2262007-08-22 13:57:39 -07002233 size_t l = 0;
Herbert Xu1a6509d2008-01-28 19:37:29 -08002234 if (x->aead)
2235 l += nla_total_size(aead_len(x->aead));
Martin Willi4447bb32009-11-25 00:29:52 +00002236 if (x->aalg) {
2237 l += nla_total_size(sizeof(struct xfrm_algo) +
2238 (x->aalg->alg_key_len + 7) / 8);
2239 l += nla_total_size(xfrm_alg_auth_len(x->aalg));
2240 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002241 if (x->ealg)
Eric Dumazet0f99be02008-01-08 23:39:06 -08002242 l += nla_total_size(xfrm_alg_len(x->ealg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002243 if (x->calg)
Thomas Graf7deb2262007-08-22 13:57:39 -07002244 l += nla_total_size(sizeof(*x->calg));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002245 if (x->encap)
Thomas Graf7deb2262007-08-22 13:57:39 -07002246 l += nla_total_size(sizeof(*x->encap));
Herbert Xu68325d32007-10-09 13:30:57 -07002247 if (x->security)
2248 l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) +
2249 x->security->ctx_len);
2250 if (x->coaddr)
2251 l += nla_total_size(sizeof(*x->coaddr));
2252
Herbert Xud26f3982007-11-13 21:47:08 -08002253 /* Must count x->lastused as it may become non-zero behind our back. */
2254 l += nla_total_size(sizeof(u64));
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002255
2256 return l;
2257}
2258
2259static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c)
2260{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002261 struct net *net = xs_net(x);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002262 struct xfrm_usersa_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002263 struct xfrm_usersa_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002264 struct nlmsghdr *nlh;
2265 struct sk_buff *skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002266 int len = xfrm_sa_len(x);
Herbert Xu0603eac2005-06-18 22:54:36 -07002267 int headlen;
2268
2269 headlen = sizeof(*p);
2270 if (c->event == XFRM_MSG_DELSA) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002271 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002272 headlen = sizeof(*id);
2273 }
Thomas Graf7deb2262007-08-22 13:57:39 -07002274 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002275
Thomas Graf7deb2262007-08-22 13:57:39 -07002276 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002277 if (skb == NULL)
2278 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002279
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002280 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2281 if (nlh == NULL)
Thomas Grafc0144be2007-08-22 13:55:43 -07002282 goto nla_put_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002283
Thomas Graf7b67c852007-08-22 13:53:52 -07002284 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002285 if (c->event == XFRM_MSG_DELSA) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002286 struct nlattr *attr;
2287
Thomas Graf7b67c852007-08-22 13:53:52 -07002288 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002289 memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr));
2290 id->spi = x->id.spi;
2291 id->family = x->props.family;
2292 id->proto = x->id.proto;
2293
Thomas Grafc0144be2007-08-22 13:55:43 -07002294 attr = nla_reserve(skb, XFRMA_SA, sizeof(*p));
2295 if (attr == NULL)
2296 goto nla_put_failure;
2297
2298 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002299 }
2300
Herbert Xu68325d32007-10-09 13:30:57 -07002301 if (copy_to_user_state_extra(x, p, skb))
2302 goto nla_put_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002303
Thomas Graf98250692007-08-22 12:47:26 -07002304 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002305
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002306 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002307
Thomas Grafc0144be2007-08-22 13:55:43 -07002308nla_put_failure:
Herbert Xu68325d32007-10-09 13:30:57 -07002309 /* Somebody screwed up with xfrm_sa_len! */
2310 WARN_ON(1);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002311 kfree_skb(skb);
2312 return -1;
2313}
2314
2315static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c)
2316{
2317
2318 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002319 case XFRM_MSG_EXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002320 return xfrm_exp_state_notify(x, c);
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002321 case XFRM_MSG_NEWAE:
2322 return xfrm_aevent_state_notify(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002323 case XFRM_MSG_DELSA:
2324 case XFRM_MSG_UPDSA:
2325 case XFRM_MSG_NEWSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002326 return xfrm_notify_sa(x, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002327 case XFRM_MSG_FLUSHSA:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002328 return xfrm_notify_sa_flush(c);
2329 default:
2330 printk("xfrm_user: Unknown SA event %d\n", c->event);
2331 break;
2332 }
2333
2334 return 0;
2335
2336}
2337
Thomas Graf7deb2262007-08-22 13:57:39 -07002338static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x,
2339 struct xfrm_policy *xp)
2340{
2341 return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire))
2342 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2343 + nla_total_size(xfrm_user_sec_ctx_size(x->security))
2344 + userpolicy_type_attrsize();
2345}
2346
Linus Torvalds1da177e2005-04-16 15:20:36 -07002347static int build_acquire(struct sk_buff *skb, struct xfrm_state *x,
2348 struct xfrm_tmpl *xt, struct xfrm_policy *xp,
2349 int dir)
2350{
2351 struct xfrm_user_acquire *ua;
2352 struct nlmsghdr *nlh;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353 __u32 seq = xfrm_get_acqseq();
2354
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002355 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0);
2356 if (nlh == NULL)
2357 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002358
Thomas Graf7b67c852007-08-22 13:53:52 -07002359 ua = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360 memcpy(&ua->id, &x->id, sizeof(ua->id));
2361 memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr));
2362 memcpy(&ua->sel, &x->sel, sizeof(ua->sel));
2363 copy_to_user_policy(xp, &ua->policy, dir);
2364 ua->aalgos = xt->aalgos;
2365 ua->ealgos = xt->ealgos;
2366 ua->calgos = xt->calgos;
2367 ua->seq = x->km.seq = seq;
2368
2369 if (copy_to_user_tmpl(xp, skb) < 0)
2370 goto nlmsg_failure;
Serge Hallyn0d681622006-07-24 23:30:44 -07002371 if (copy_to_user_state_sec_ctx(x, skb))
Trent Jaegerdf718372005-12-13 23:12:27 -08002372 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08002373 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002374 goto nlmsg_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375
Thomas Graf98250692007-08-22 12:47:26 -07002376 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377
2378nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002379 nlmsg_cancel(skb, nlh);
2380 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002381}
2382
2383static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt,
2384 struct xfrm_policy *xp, int dir)
2385{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002386 struct net *net = xs_net(x);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002388
Thomas Graf7deb2262007-08-22 13:57:39 -07002389 skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002390 if (skb == NULL)
2391 return -ENOMEM;
2392
2393 if (build_acquire(skb, x, xt, xp, dir) < 0)
2394 BUG();
2395
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002396 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397}
2398
2399/* User gives us xfrm_user_policy_info followed by an array of 0
2400 * or more templates.
2401 */
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002402static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403 u8 *data, int len, int *dir)
2404{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002405 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data;
2407 struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1);
2408 struct xfrm_policy *xp;
2409 int nr;
2410
Venkat Yekkiralacb969f02006-07-24 23:32:20 -07002411 switch (sk->sk_family) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 case AF_INET:
2413 if (opt != IP_XFRM_POLICY) {
2414 *dir = -EOPNOTSUPP;
2415 return NULL;
2416 }
2417 break;
2418#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2419 case AF_INET6:
2420 if (opt != IPV6_XFRM_POLICY) {
2421 *dir = -EOPNOTSUPP;
2422 return NULL;
2423 }
2424 break;
2425#endif
2426 default:
2427 *dir = -EINVAL;
2428 return NULL;
2429 }
2430
2431 *dir = -EINVAL;
2432
2433 if (len < sizeof(*p) ||
2434 verify_newpolicy_info(p))
2435 return NULL;
2436
2437 nr = ((len - sizeof(*p)) / sizeof(*ut));
David S. Millerb4ad86bf2006-12-03 19:19:26 -08002438 if (validate_tmpl(nr, ut, p->sel.family))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439 return NULL;
2440
Herbert Xua4f1bac2005-07-26 15:43:17 -07002441 if (p->dir > XFRM_POLICY_OUT)
2442 return NULL;
2443
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002444 xp = xfrm_policy_alloc(net, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002445 if (xp == NULL) {
2446 *dir = -ENOBUFS;
2447 return NULL;
2448 }
2449
2450 copy_from_user_policy(xp, p);
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002451 xp->type = XFRM_POLICY_TYPE_MAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002452 copy_templates(xp, ut, nr);
2453
2454 *dir = p->dir;
2455
2456 return xp;
2457}
2458
Thomas Graf7deb2262007-08-22 13:57:39 -07002459static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp)
2460{
2461 return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire))
2462 + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr)
2463 + nla_total_size(xfrm_user_sec_ctx_size(xp->security))
2464 + userpolicy_type_attrsize();
2465}
2466
Linus Torvalds1da177e2005-04-16 15:20:36 -07002467static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp,
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002468 int dir, struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002469{
2470 struct xfrm_user_polexpire *upe;
2471 struct nlmsghdr *nlh;
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002472 int hard = c->data.hard;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002474 nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0);
2475 if (nlh == NULL)
2476 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002477
Thomas Graf7b67c852007-08-22 13:53:52 -07002478 upe = nlmsg_data(nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002479 copy_to_user_policy(xp, &upe->pol, dir);
2480 if (copy_to_user_tmpl(xp, skb) < 0)
2481 goto nlmsg_failure;
Trent Jaegerdf718372005-12-13 23:12:27 -08002482 if (copy_to_user_sec_ctx(xp, skb))
2483 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08002484 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002485 goto nlmsg_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486 upe->hard = !!hard;
2487
Thomas Graf98250692007-08-22 12:47:26 -07002488 return nlmsg_end(skb, nlh);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002489
2490nlmsg_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002491 nlmsg_cancel(skb, nlh);
2492 return -EMSGSIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493}
2494
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002495static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002496{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002497 struct net *net = xp_net(xp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002498 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499
Thomas Graf7deb2262007-08-22 13:57:39 -07002500 skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002501 if (skb == NULL)
2502 return -ENOMEM;
2503
Jamal Hadi Salimd51d0812006-03-20 19:16:12 -08002504 if (build_polexpire(skb, xp, dir, c) < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002505 BUG();
2506
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002507 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002508}
2509
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002510static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c)
2511{
Alexey Dobriyanfc34acd2008-11-25 17:50:08 -08002512 struct net *net = xp_net(xp);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002513 struct xfrm_userpolicy_info *p;
Herbert Xu0603eac2005-06-18 22:54:36 -07002514 struct xfrm_userpolicy_id *id;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002515 struct nlmsghdr *nlh;
2516 struct sk_buff *skb;
Thomas Graf7deb2262007-08-22 13:57:39 -07002517 int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002518 int headlen;
2519
2520 headlen = sizeof(*p);
2521 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Graf7deb2262007-08-22 13:57:39 -07002522 len += nla_total_size(headlen);
Herbert Xu0603eac2005-06-18 22:54:36 -07002523 headlen = sizeof(*id);
2524 }
Thomas Grafcfbfd452007-08-22 13:57:04 -07002525 len += userpolicy_type_attrsize();
Thomas Graf7deb2262007-08-22 13:57:39 -07002526 len += NLMSG_ALIGN(headlen);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002527
Thomas Graf7deb2262007-08-22 13:57:39 -07002528 skb = nlmsg_new(len, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002529 if (skb == NULL)
2530 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002531
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002532 nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0);
2533 if (nlh == NULL)
2534 goto nlmsg_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002535
Thomas Graf7b67c852007-08-22 13:53:52 -07002536 p = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002537 if (c->event == XFRM_MSG_DELPOLICY) {
Thomas Grafc0144be2007-08-22 13:55:43 -07002538 struct nlattr *attr;
2539
Thomas Graf7b67c852007-08-22 13:53:52 -07002540 id = nlmsg_data(nlh);
Herbert Xu0603eac2005-06-18 22:54:36 -07002541 memset(id, 0, sizeof(*id));
2542 id->dir = dir;
2543 if (c->data.byid)
2544 id->index = xp->index;
2545 else
2546 memcpy(&id->sel, &xp->selector, sizeof(id->sel));
2547
Thomas Grafc0144be2007-08-22 13:55:43 -07002548 attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p));
2549 if (attr == NULL)
2550 goto nlmsg_failure;
2551
2552 p = nla_data(attr);
Herbert Xu0603eac2005-06-18 22:54:36 -07002553 }
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002554
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002555 copy_to_user_policy(xp, p, dir);
2556 if (copy_to_user_tmpl(xp, skb) < 0)
2557 goto nlmsg_failure;
Jamal Hadi Salim1459bb32006-11-20 16:51:22 -08002558 if (copy_to_user_policy_type(xp->type, skb) < 0)
Masahide NAKAMURAf7b69832006-08-23 22:49:28 -07002559 goto nlmsg_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002560
Thomas Graf98250692007-08-22 12:47:26 -07002561 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002562
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002563 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002564
2565nlmsg_failure:
2566 kfree_skb(skb);
2567 return -1;
2568}
2569
2570static int xfrm_notify_policy_flush(struct km_event *c)
2571{
Alexey Dobriyan70678022008-11-25 17:50:36 -08002572 struct net *net = c->net;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002573 struct nlmsghdr *nlh;
2574 struct sk_buff *skb;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002575
Thomas Graf7deb2262007-08-22 13:57:39 -07002576 skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002577 if (skb == NULL)
2578 return -ENOMEM;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002579
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002580 nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0);
2581 if (nlh == NULL)
2582 goto nlmsg_failure;
Jamal Hadi Salim0c51f532006-11-27 12:58:20 -08002583 if (copy_to_user_policy_type(c->data.type, skb) < 0)
2584 goto nlmsg_failure;
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002585
Thomas Graf98250692007-08-22 12:47:26 -07002586 nlmsg_end(skb, nlh);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002587
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002588 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC);
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002589
2590nlmsg_failure:
2591 kfree_skb(skb);
2592 return -1;
2593}
2594
2595static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
2596{
2597
2598 switch (c->event) {
Herbert Xuf60f6b82005-06-18 22:44:37 -07002599 case XFRM_MSG_NEWPOLICY:
2600 case XFRM_MSG_UPDPOLICY:
2601 case XFRM_MSG_DELPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002602 return xfrm_notify_policy(xp, dir, c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002603 case XFRM_MSG_FLUSHPOLICY:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002604 return xfrm_notify_policy_flush(c);
Herbert Xuf60f6b82005-06-18 22:44:37 -07002605 case XFRM_MSG_POLEXPIRE:
Jamal Hadi Salim26b15da2005-06-18 22:42:13 -07002606 return xfrm_exp_policy_notify(xp, dir, c);
2607 default:
2608 printk("xfrm_user: Unknown Policy event %d\n", c->event);
2609 }
2610
2611 return 0;
2612
2613}
2614
Thomas Graf7deb2262007-08-22 13:57:39 -07002615static inline size_t xfrm_report_msgsize(void)
2616{
2617 return NLMSG_ALIGN(sizeof(struct xfrm_user_report));
2618}
2619
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002620static int build_report(struct sk_buff *skb, u8 proto,
2621 struct xfrm_selector *sel, xfrm_address_t *addr)
2622{
2623 struct xfrm_user_report *ur;
2624 struct nlmsghdr *nlh;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002625
Thomas Graf79b8b7f2007-08-22 12:46:53 -07002626 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0);
2627 if (nlh == NULL)
2628 return -EMSGSIZE;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002629
Thomas Graf7b67c852007-08-22 13:53:52 -07002630 ur = nlmsg_data(nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002631 ur->proto = proto;
2632 memcpy(&ur->sel, sel, sizeof(ur->sel));
2633
2634 if (addr)
Thomas Grafc0144be2007-08-22 13:55:43 -07002635 NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002636
Thomas Graf98250692007-08-22 12:47:26 -07002637 return nlmsg_end(skb, nlh);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002638
Thomas Grafc0144be2007-08-22 13:55:43 -07002639nla_put_failure:
Thomas Graf98250692007-08-22 12:47:26 -07002640 nlmsg_cancel(skb, nlh);
2641 return -EMSGSIZE;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002642}
2643
Alexey Dobriyandb983c12008-11-25 17:51:01 -08002644static int xfrm_send_report(struct net *net, u8 proto,
2645 struct xfrm_selector *sel, xfrm_address_t *addr)
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002646{
2647 struct sk_buff *skb;
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002648
Thomas Graf7deb2262007-08-22 13:57:39 -07002649 skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002650 if (skb == NULL)
2651 return -ENOMEM;
2652
2653 if (build_report(skb, proto, sel, addr) < 0)
2654 BUG();
2655
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002656 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC);
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002657}
2658
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002659static inline size_t xfrm_mapping_msgsize(void)
2660{
2661 return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping));
2662}
2663
2664static int build_mapping(struct sk_buff *skb, struct xfrm_state *x,
2665 xfrm_address_t *new_saddr, __be16 new_sport)
2666{
2667 struct xfrm_user_mapping *um;
2668 struct nlmsghdr *nlh;
2669
2670 nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0);
2671 if (nlh == NULL)
2672 return -EMSGSIZE;
2673
2674 um = nlmsg_data(nlh);
2675
2676 memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr));
2677 um->id.spi = x->id.spi;
2678 um->id.family = x->props.family;
2679 um->id.proto = x->id.proto;
2680 memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr));
2681 memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr));
2682 um->new_sport = new_sport;
2683 um->old_sport = x->encap->encap_sport;
2684 um->reqid = x->props.reqid;
2685
2686 return nlmsg_end(skb, nlh);
2687}
2688
2689static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr,
2690 __be16 sport)
2691{
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002692 struct net *net = xs_net(x);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002693 struct sk_buff *skb;
2694
2695 if (x->id.proto != IPPROTO_ESP)
2696 return -EINVAL;
2697
2698 if (!x->encap)
2699 return -EINVAL;
2700
2701 skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC);
2702 if (skb == NULL)
2703 return -ENOMEM;
2704
2705 if (build_mapping(skb, x, ipaddr, sport) < 0)
2706 BUG();
2707
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002708 return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC);
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002709}
2710
Linus Torvalds1da177e2005-04-16 15:20:36 -07002711static struct xfrm_mgr netlink_mgr = {
2712 .id = "netlink",
2713 .notify = xfrm_send_state_notify,
2714 .acquire = xfrm_send_acquire,
2715 .compile_policy = xfrm_compile_policy,
2716 .notify_policy = xfrm_send_policy_notify,
Masahide NAKAMURA97a64b42006-08-23 20:44:06 -07002717 .report = xfrm_send_report,
Shinta Sugimoto5c79de62007-02-08 13:12:32 -08002718 .migrate = xfrm_send_migrate,
Martin Willi3a2dfbe2008-10-28 16:01:07 -07002719 .new_mapping = xfrm_send_mapping,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002720};
2721
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002722static int __net_init xfrm_user_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002723{
Patrick McHardybe336902006-03-20 22:40:54 -08002724 struct sock *nlsk;
2725
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002726 nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX,
Patrick McHardyaf65bdf2007-04-20 14:14:21 -07002727 xfrm_netlink_rcv, NULL, THIS_MODULE);
Patrick McHardybe336902006-03-20 22:40:54 -08002728 if (nlsk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002729 return -ENOMEM;
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002730 net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002731 rcu_assign_pointer(net->xfrm.nlsk, nlsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002732 return 0;
2733}
2734
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002735static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list)
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002736{
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002737 struct net *net;
2738 list_for_each_entry(net, net_exit_list, exit_list)
2739 rcu_assign_pointer(net->xfrm.nlsk, NULL);
2740 synchronize_net();
2741 list_for_each_entry(net, net_exit_list, exit_list)
2742 netlink_kernel_release(net->xfrm.nlsk_stash);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002743}
2744
2745static struct pernet_operations xfrm_user_net_ops = {
Eric W. Biedermand79d7922009-12-03 02:29:05 +00002746 .init = xfrm_user_net_init,
2747 .exit_batch = xfrm_user_net_exit,
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002748};
2749
2750static int __init xfrm_user_init(void)
2751{
2752 int rv;
2753
2754 printk(KERN_INFO "Initializing XFRM netlink socket\n");
2755
2756 rv = register_pernet_subsys(&xfrm_user_net_ops);
2757 if (rv < 0)
2758 return rv;
2759 rv = xfrm_register_km(&netlink_mgr);
2760 if (rv < 0)
2761 unregister_pernet_subsys(&xfrm_user_net_ops);
2762 return rv;
2763}
2764
Linus Torvalds1da177e2005-04-16 15:20:36 -07002765static void __exit xfrm_user_exit(void)
2766{
2767 xfrm_unregister_km(&netlink_mgr);
Alexey Dobriyana6483b72008-11-25 17:38:20 -08002768 unregister_pernet_subsys(&xfrm_user_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769}
2770
2771module_init(xfrm_user_init);
2772module_exit(xfrm_user_exit);
2773MODULE_LICENSE("GPL");
Harald Welte4fdb3bb2005-08-09 19:40:55 -07002774MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_XFRM);
Jamal Hadi Salimf8cd5482006-03-20 19:15:11 -08002775